Chacin, 25, has two of his three wins against the Padres. In two starts against the Padres this season, the Venezuelan has allowed three runs on 10 hits and two walks in 11 2/3 innings. Chacin was the Rockies Opening Day starter and was 3-0 in April with a 1.46 ERA. He was 0-3 in May with a 5.87 ERA.